Determination of Gibbs energy of formation of cuspidine (3CaO · 2SiO2 · CaF2) from the electromotive force method using CaF2 as the solid electrolyte

Hiroyuki Fukuyama, Hideki Tabata, Kazuhiro Nagata

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The standard Gibbs energy change for the following reaction has been directly determined by electromotive force (EMF) measurement using CaF2 as the solid electrolyte in the temperature range from 1313 to 1329 K. 3CaO · 2SiO2 · CaF2 (s) + CaO (s) = 2(2CaO · SiO2) (s) + CaF2 (s) ΔrG°/kJ = 15.9 - 0.01927 (±0.2) From the preceding results, the standard Gibbs energy of formation of cuspidine has been evaluated for the first time as Δ/G°(cuspidine)/kJmol-1 = -5198 + 0.8257 (±12) The chemical potential diagram for the CaO-SiO2-CaF2 system has been developed at 1323 K based on the thermodynamic data obtained in the present study.

Original languageEnglish
Pages (from-to)307-311
Number of pages5
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume34
Issue number3
DOIs
Publication statusPublished - 2003 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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